2004 Buick Rendezvous Dim brake and running light

JS.PARSONS

MEMBER
2004 BUICK RENDEZVOUS
6 CYL
AWD
AUTOMATIC
68,000 MILES

The rear passenger running light and brake like of our Rendezbous is dim. I noticed this the other day and replaced the bulb. Even after replacing the bulb it was still dim. To make sure it was the right bulb I even swapped it out with the other side which is fine. The light is still dim. Are there any suggestions?

1 Reply

JASONRAY

MECHANIC
213 POSTS

Sounds like you're losing a ground at that light. Do you have access to a DVOM? If so, take the bulb out of it's socket, exposing the contacts for the bulb. Turn the lights on and see exactly how much voltage you're getting at the socket. Should be close to battery voltage. Use a regular test light, grounded to the chassis of the vehicle or somewhere you KNOW is a good ground and have a helper apply the brakes. Does the test light get bright or is is dim, as well? Check it on both sides so you're able to compare if it's not really obvious. Try this. If the test light gets real bright, but the bulb doesn't, you have a ground problem. Get back with the results and well walk through fixing it, no matter what it is.